Umm.....disco-lock is a current meta deck that has really good returns, with the expansion introducing new discard mechanics and the Broodmother this card will be amazing in constructed......In Arena Lakkari Sacrifice will be mostly useless.......

I remember in dark wanderer tavern brawl, if you completed all secrets, you were supposed to go against the cow king in the secret level.

but before the cow king was summoned, a portal, kinda like the nether portal Enigmatic Portal that couldn't be targeted, i think , appeared. I've seen a streamer Sylvanas stealing the portal and so, the player became the cow king instead!